Spinel type ferrite material based on rare earth element lanthanum or cerium doping

A technology of ferrite materials and rare earth elements, which is applied in the fields of iron compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of not being retrieved, and achieve the effects of simple methods, mild reaction conditions, and short reaction cycles

Pending Publication Date: 2021-09-07
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, spinel-type infrared radiation materials ALa doped with rare earth elements lanthanum or cerium are prepared by one-step hydrothermal method combined with crystallization treatment technology. x Fe 2-x o 4 or ACe x Fe 2-x o 4 Related articles have not been retrieved

Method used

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  • Spinel type ferrite material based on rare earth element lanthanum or cerium doping
  • Spinel type ferrite material based on rare earth element lanthanum or cerium doping
  • Spinel type ferrite material based on rare earth element lanthanum or cerium doping

Examples

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preparation example Construction

[0041] Its preparation method includes the following steps:

[0042] The ⑴ A, La and Ce or Fe metal nitrate by 1: x: weighed in a container after a molar ratio of 2-x metal element was added 8 ~ 12 mL ultrapure water was stirred until completely dissolved to obtain a mixed liquid.

[0043] ⑵ mixture was added a precipitating agent, and stirring was continued for 1.0 ~ 2.0 h, the precipitate was obtained pH = 7 to 13. Precipitating agent refers to one or both of sodium carbonate, sodium hydroxide, ammonia water.

[0044]⑶ precipitate was charged to the autoclave after complete seal placed 100 ~ 150 ℃ incubated processing furnace 3 ~ 5 h, then cooled to room temperature to give a solid product.

[0045] ⑷ solid product was filtered and washed with ultrapure water under reduced pressure to pH = 6 ~ 8, precipitate was isolated by suction filtration, 60 ~ 90 ℃ dried 5 ~ 8 h, to give solid powder.

[0046] ⑸ solid powder after the crystallization treatment to obtain good crystallinity o...

Embodiment 1

[0048] Example 1 A rare earth element-based embodiment La 3+ Spinel ferrite material which chemical formula NiLa x FE 2-x O 4 .

[0049] 1) NiLa x FE 2-x O 4 (X = 0) is prepared:

[0050] The ⑴ 2.908 g 8.080 g nickel nitrate and ferric nitrate in a container, 10 mL of ultrapure water with stirring until completely dissolved, to obtain a mixture.

[0051] ⑵ mixture was added at a concentration of 30 wt% ammonia water, and stirring was continued for 1.0 ~ 2.0 h, the precipitate obtained was pH = 9.

[0052] The precipitate ⑶ sealing liquid charged in the autoclave was placed 130 ℃ After completion of the processing furnace incubated 4 h, then cooled to room temperature to give a solid product.

[0053] ⑷ solid product was filtered under reduced pressure and washed with ultrapure water to pH = 7, the precipitate was isolated by suction filtration, and dried 70 ℃ 8 h, to give solid powder.

[0054] ⑸ solid powder by heating rate 5 ° / min to a holding furnace for 4 hours at 500 deg.] ...

Embodiment 2

[0071] Example 2 Based on the rare earth element La embodiment 3+ Spinel ferrite material which chemical formula NiLa x FE 2-x O 4 .

[0072] 1) NiLa x FE 2-x O 4 (X = 0) is prepared:

[0073] The ⑴ 2.908 g 8.080 g nickel nitrate and ferric nitrate in a container, was added 8 mL of ultrapure water with stirring until completely dissolved, to obtain a mixture.

[0074] ⑵ mixture was added at a concentration of 30 wt% ammonia water, and stirring was continued for 1.0 ~ 2.0 h, the precipitate solution to obtain pH = 7.

[0075] ⑶ precipitate was charged to the autoclave after complete seal placed 100 ℃ incubated processing furnace 3 h, then cooled to room temperature to give a solid product.

[0076] ⑷ solid product was filtered under reduced pressure and washed with ultrapure water to pH = 6, the precipitate was isolated by suction filtration, and dried 70 ℃ 8 h, to give solid powder.

[0077] ⑸ solid powder by 3 ° / min heating rate holding furnace incubated for 2 hours at 300 deg....

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Abstract

The invention relates to a spinel ferrite material doped with rare earth element lanthanum or cerium. The chemical general formula of the material is ALaxFe2-xO4 or ACexFe2-xO4, wherein A is one of Ni, Cu and a mixture of Ni and Cu in any ratio, and x is greater than or equal to 0 and less than or equal to 0.50. According to the invention, a one-step hydrothermal method is combined with a crystallization treatment technology to dope a rare earth element lanthanum or cerium into a spinel type nickel/copper ferrite structure to form an ALaxFe2-xO4 or ACexFe2-xO4 infrared radiation material, and the spinel type ferrite material has very high normal infrared emissivity at a wave band of 3-12 [mu]m, and can be applied to the technical field of infrared heating.

Description

Technical field [0001] The present invention relates to the field of new materials, and particularly to a cerium-doped lanthanum or a rare earth element-based spinel ferrite material. Background technique [0002] In recent years, with the accelerated process of industrialization, global energy shortage problems have become increasingly severe. Therefore, to explore alternative sources of energy supply is clearly a priority. Infrared radiation is a clean new energy, human health and the natural environment-friendly, covering power generation and applications, it is to promote environmentally sustainable industrial development of clean energy, the most promising candidates. There is no doubt, will explore high infrared radiation material to provide an energy-efficient and convenient method. [0003] Ferrite material because of its larger coercive force, high saturation magnetization, chemically stable and high performance characteristics such as infrared radiation, and therefore b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00
CPCC01G49/0054C01P2002/72C01P2002/82C01P2004/03C01P2006/42
Inventor 高祥虎金鹏霞刘维民刘刚何成玉赵士杰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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